Basic thought of this list is using the Grandmaster and Mordrak to give scout to purifiers and strike squads to get the added movement out of the razorbacks and hopefully go for first turn assault if the opposing army deployed close enough. As well the GM is with Mordrak and the Ghost Knights for the first to the fray ability.

So, purifiers will combat squad and psycannons will stay back to provide covering fire? Not a bad list.

Since you want your purifiers advancing fast, maybe better to put them in a rhino? They can all fit if you don't want to split them up and they can still fire out of the top hatch if the rhino only moves 6". The razorback won't be able to fire its TWLLC if you move over 6" anyway. I know you give up 2 TWLLC's but the extra 75 pts can be put somewhere else. Just my two cents...

_________________"Though we face the power of hell, and death is at our side, we fear not, for the Emperor is with us through it all. If we live, we live for the Emperor. If we die, we die for the Emperor. So whether we live or die, we are the Emperor's. We are Grey Knights and this is why we came to be." --Grandmaster Rivan

"It is said that if you know your enemies and know yourself, you will not be imperiled in a hundred battles; if you do not know your enemies but do know yourself, you will win one and lose one; if you do not know your enemies nor yourself, you will be imperiled in every single battle." --Sun Tzu (from ancient Earth)

I thought of that, but the scout rule from Grand Strategy to the razorbacks will be amazing getting that distance in from the scout move and without the 2 TL lascannons the list is seriously lacking heavy weapon fire.